Baghdad – Shiite militants and police enraged by massive truck bombings in Tall Afar went on a revenge spree against Sunni residents in the northwestern town Wednesday, killing as many as 60 people, officials said.

The gunmen roamed Sunni neighborhoods in the city through the night, shooting at residents and homes, according to police and a local Sunni politician. Witnesses said relatives of the Shiite victims in the truck bombings broke into the Sunni homes and killed the men inside or dragged them out and shot them in the streets.

Ali al-Talafari, a Sunni member of the local Turkomen Front Party, said the Iraqi army had arrested 18 policemen accused of being involved after they were identified by the Sunni families targeted. But he said the attackers included Shiite militiamen.

He said more than 60 Sunnis had been killed, but a senior hospital official in Tall Afar put the death toll at 45, with four wounded.

The hospital official, who spoke on condition of anonymity because of security concerns, said the victims were men between the ages of 15 and 60, and they were killed with a shot to the back of the head.

Police said earlier dozens of Sunnis were killed or wounded, but they had no precise figures, and communications problems made it difficult to reach them for an update.

Army troops later moved into the Sunni areas to stop the violence and a curfew was slapped on the entire town, according to Wathiq al-Hamdani, the provincial police chief and his head of operations, Brig. Abdul-Karim al-Jibouri.

“The situation is under control now,” said al-Hamdani. “The local Tall Afar police have been confined to their bases, and policemen from Mosul are moving there to replace them.”

Tall Afar, located 260 miles northwest of Baghdad, is in the province of Ninevah, of which Mosul is the capital. It is a mainly Turkomen city with some 60 percent of its residents adhering to Shiite Islam and the rest mostly Sunnis.

The violence came a day after two truck bombs shattered markets in the city, killing at least 63 people and wounding dozens in the second assault in four days. After Tuesday’s bombings, suspected Sunni insurgents tried to ambush ambulances carrying the injured out of the city but were driven off by police gunfire, Iraqi authorities said.

The carnage was the worst bloodshed in a surge of violence across Iraq as militants on both sides of the sectarian divide apparently have fled to other parts of the country to avoid a U.S.-Iraqi security crackdown, raising tensions outside the capital.

Meanwhile, suicide bombers detonated explosives on trucks carrying highly toxic chlorine in Fallujah, wounding about 15 U.S. and Iraqi security forces, the American military said. The military said the attackers were blocked by Iraqi army soldiers and police from setting off the bombs at the Fallujah government center.

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